Short Essay Response Example | Topics and Well Written Essays - 1000 words

Short Response - Essay Example Sustainability, however, is hard to attain in urban areas, where cities with high population density equate to large production of wastes and rapid consumption of natural resources. One of the most pressing problems facing urban planners today is how to create sustainable urban communities and to bring existing non-sustainable communities to the path of sustainability. Some of the potential avenues toward solving the issue of sustainability are creating a new city that is similar to a town in walkability and closed-loop metabolism, but a global one, because of the use of technology and modern networks in attaining its sustainability goals; understanding the unique strengths and constraints of every urban community for urban planning/redesign; and incorporating ecological concepts and principles in how urban communities are perceived, which require collaboration across all main stakeholders, including the government, the business community, citizens, and other related professionals. The historical roots of these problems on sustainability are the vast industrialization across the world during the past centuries and the free-market philosophy of liberal economics and capitalism that disregard sustainability principles. Industrialization, since the eighteenth century up to now (as it goes in more in developing countries), has resulted to widespread exploitation of natural resources and workers alike (WCED 354). As the Brundtland report summarizes: â€Å"Thus today’s environmental challenges arise both from the lack of development and from the unintended consequences of some forms of economic growth† (WCED 354). In urban design, it means converting agricultural areas to manufacturing/commercial/residential/entertainment sites and creating high-rise cities where population is more compact and where resources are swiftly consumed.

The experiment safe Essay Example for Free

The experiment safe Essay In every day lives we come across a number of different objects that are bouncing, colliding and in motion. All these are attributable to the energy changes involved in the process thus obeying the law of conservation of energy. The law of conservation of energy states that energy can neither be created nor destroyed and that the sum total of energy in this universe remains constant. This scientific method of looking at energy changes can be associated and implemented on a variety of simple things and one among them being observation of bouncing objects. This motivation has lead me to investigate, understand and analyse bouncing of a ball on a surface. However, understanding the bouncing mechanism is not as simple as it appears, because there are several factors involved during the bouncing action. For example, the material of the ball, the type and nature of surface over which it freely falls, frictional factors due to air resistance, temperature affecting the surrounding air molecules as well as during the ball-surface interactions. Preliminary Investigation Looking around practically made me notice a variety of different types and sizes of balls. There were golf balls, tennis balls, footballs, sponge balls, cricket balls, bouncy balls, etc. I observed them carefully and noticed that none were similar in any way. The cricket balls were the only ones made out of leather, the bouncy balls were made out of dense rubber, and the golf balls were made of plastic. I tried to test the bounce of these balls on different surfaces like carpeted flooring and wooden flooring. I found that each ball when dropped on these flooring was bouncing to different heights. I felt that each of these balls when dropped on a given flooring surface had different factors that influenced their bounce. Also I noticed that the ball being dropped constantly bounced almost at the same height. This made me feel that I could use this as my chosen experiment for further investigations. As mentioned earlier, the bouncing of balls may look simple, but the energy conversions are quite complex. In simple terms, the work done during a bouncing ball system involves three possible energy sources, 1) Gravitational potential energy (energy due to its position) 2) Kinetic energy (energy due to its motion) 3) frictional energy (lost due to production of heat and sound). The ball acquires Gravitational Potential Energy because of its position and also the ball is working against the gravity to acquire this position. Kinetic energy is gained during the motion of the ball. The frictional energy is lost due to the production of heat and sound. In fact, the conversion of the potential energy results in the kinetic energy of motion until the bounce is over and this potential energy is regained as ball acquires the next position or height. However, on each bounce over a given surface energy of impact is transferred to the surface on which it bounces. Also energy is used up in over coming the air resistance. The energy of impact can be split into sound energy, heat energy or light energy (spark) in the case of very heavy balls (for ex. Iron balls striking iron plate surfaces). This can be totally called as frictional energy loss. The process of bouncing continues with frictional loss occurring on each bounce and this effect could be known as damping. Damping means the loss of height on each bounce on a given surface. The damping effect decreases until the ball attains the minimum potential energy. The damping effect influences the speed and so it tends to slow down the ball each time it impacts the surface. To observe this effect experiments were planned to drop large bouncy balls on different surfaces and to note the rebound heights. Preliminary Results Bounce Quality Number Balls used Carpet flooring Wooden flooring 1 Golf Ball Low Medium 2 Tennis Ball Medium Medium 3 Football Low Low 4 Sponge Ball Low Low 5 Cricket Ball Low Low 6 Bouncy Ball Medium High Below are the formulae of different types of energy and work done: Potential Energy: PE = mgh 1) Where, m= mass of the ball (kg) g= acceleration due to gravity () h= height of the bounce(m) Work Done: Wd = F x d -(2) Where,F= Force (N) d = bounce height (m) Also as part of my preliminary work I did some work using a CD Called Science Investigations. This was very useful as I could see how the ball rebound height would differ if I changed the temperature of the ball. The ball being used was a squash ball. The results I gained were as follows (assuming that the drop height was kept the same-1metre): Temperature(i C) Rebound height(cm)Â   (The rebound height was measured from the bottom of the ball. ) As you can see, these results seem fairly realistic and accurate. As the temperature inside the squash ball increased, the rebound height increased. This was the case in all of the tests. Also using this CD I could investigate the different amounts of energy bring used up when a ball bounces. A ball has 100% gravitational potential energy when it is in your hand. As soon as you release it the amount of gravitational potential energy decreases and instead, 100% Kinetic energy is formed. However, when the ball hits the ground there is no kinetic energy or gravitational potential energy. Instead, there is only elastic potential energy and heat/sound energy. After the ball hits the ground, kinetic energy is regained again, but it is not a full 100%, it is only 80%. 20% of the energy was used up as heat/sound energy. So when the ball is caught in your hand again, the gravitational potential energy returns, but there is only 20% of what there previously was, so the ball does not reach its drop height. Safety: To make the experiment safe, I will have to make sure of the following: That the nail that supports the ball is tightly secured in its position. That the balls are used in a proper manner in all situations. The equipment like the clamp and stand are fixed to the workbench securely. To make this test fair I will have to make sure of the following: That the metre rule is straight and not at an angle. That I release the ball from the given point. E. g. Place the bottom of the bouncy ball in line with the one metre mark, the 0. 8 metre mark etc. Just release the ball without adding any extra force. Keep the temperature in the room constant. Make sure that there is very little air movement. Make sure that you have the same experimental conditions for all the three trials. The factor I will be investigating is the height I drop the ball.

Structure and Uses of Ibuprofen

Structure and Uses of Ibuprofen Abstract The Controlled-release dosage forms are formulated to release the drugs active ingredient gradually and predictably over an extended period of time that is something like 12 to 24 hour period. â€Å"These formulations potentially provide for greater effectiveness in the treatment of chronic conditions through more consistent delivery of the medication; reduced side effects; greater convenience; and higher levels of patient compliance due to a simplified dosage schedule, compared with those of immediate-release drugs†. Ibuprofen is a colourless, crystalline solid which is having a low soluble limits in water but it is having a better solublity in most organic solvents. â€Å"The main aim of this work is control the release of drug by encapsulating it in to coating materials like fattyacids (palmiticacid and pluronic F-127). Encapsulating of ibuprofen by using freeze drying technique in this technique Ibuprofen is encapsulated in to the fattyacid and pluronic (F127), these coating materials have the property of controlling the release of drug when the coated drug is entered in to the body the coating materials which surrounded to the drug is control the release of drug†. The release of encapsulated ibuprofen is determined by Flow through dissolution and UV- visible spectroscopy. INTRODUCTION 1. IBUPROFEN Ibuprofen is a colourless, crystalline solid which is having a very very low solubility limits I case of water but it is having comparabelly better soluble limits in case of organic solvents. The synthesis of ibuprofen was originally reported in 1964 from Ï -isobutyl- lacetophen but the drug was not marketed in the United States until 1974 despite the fact that it had been available for several years in Europe. â€Å"It was the indomethacin and was immediately accepted in therapy. Its success was a factor in the introduction of many new agents in the 1970s. Ibuprofen was the first aryl propionic acid derivative to be marketed in the United States†. This chemical class currently comprises of the largest group of NSAIDs under investigation with as many as 25 derivatives in various stages of development. â€Å"It recently became the first prescription NSAIA to become available as an over the counter analgesic in almost 30 years and is avialble under a number of trade names, It is also sometimes known as: Advil, Anadin Ibuprofen, Arthrofen, Brufen, Retard, Cuprofen, Fenbid; Galprofen, Hedex Ibuprofen, Ibufem; Librofem; Mandafen; Manorfen; Migrafen; Motrin; Nurofen; Obifen; Relcofen perhaps being among the more widely used. The continuing popularity of ibuprofen is evidenced by the appearance 200 prescription drugs in the United States†. IUPAC name : 2-[4-(2-methylpropyl) phenyl] propanoacid, Formula : C13H18O2, Molecular mass : 206.28, Melting point : 76  °C (1. 69  °F) Bioavailability : 49-73, Protein binding : 99%, Metabolism : Hepatic, Half life : 1.8-2 hours, Excretion : Renal. 1.1 Structure of Ibuprofen Structure of IBUPROFEN Ibuprofen is a white powder belonging to the propionic acid derivatives, with a melting point of 74 77 ° C. It is only slightly soluble in water but readily soluble in organic solvents such as ethanol. It is a chiral compound; racemic Ibuprofen is usually used, although only one form is active medicinally. â€Å"Ibuprofen is made up of covalently-bonded carbon, hydrogen, and oxygen atoms. 2 CH3 molecules are single-bonded to a CH molecule The CH molecule is bonded to a carbon atom that forms a 6-sided ring of carbon atoms†. Another CH molecule is single-bonded to a carbon atom on the other side of the ring. Inside the ring there are 3 double bonds between carbon atoms. Then another CH3 molecule and a COOH molecule are both single bonded to the CH molecule on the right. Because it is nonsteroidal, it is widely used as it does not upset the hormonal balance in the body. Its anti-inflammatory, analgesic (pain relieving) and antipyretic (fever reducing) actions are co moderate pain such as headache, toothache, and migraine as well as symptoms of fever. 1.2 Stereochemistry Ibuprofen contains a chiral carbon in the ∞ position of the propionate moiety. As such, there are two possible enantiomers of ibuprofen, with the potential for different biological effects and metabolism for each enantiomer. Indeed it was found that (S)(+)- ibuprofen (dexibuprofen) was the active form both in vitro and in vivo, because of this reason the ibuprofen is marketed as a single enantiomer as occurs with naproxen and other NSAIDs. And the in vivo experiments revealed the existence of an Isomerase (2-arylpropionylco-A epimerase) which converted (R) -ibuprofen to the active (S)-enantiomer .Most of the ibuprofen formulations are marketed as racemic mixtures. Racemic ibuprofen is an important NSAID used in the treatment of pain and inflammation in a variety of musculoskeletal rheumatic disorders. 1.3 Synthesis â€Å"There have been many commercial and laboratory publications for the synthesis of Ibuprofen. Two of the most popular ways to obtain Ibuprofen are the Boot process and the Hoechst process. The Boot process is an older commercial process developed by the Boot Pure Drug Company, and the Hoechst process is a newer process developed by the Hoechst Company. Most of these routes to Ibuprofen begin with isobutyl benzene and use Friedel-Crafts acylation. The Boot process requires six steps, while the Hoechst process, with the assistance of catalysts, is completed in only three steps†. Cheminor Drugs have developed a process for an improved version of ibuprofen based on chiral synthesis. The move is significant given that pure S-Ibuprofen (the active form of ibuprofen) could near halve the regular ibuprofen dosage, besides improving the side-effect profile. However the human body can convert the inactive (R) form into the (S) form, so eventually 100% of the ibuprofen taken becomes active. The process discovered by Cheminor is therefore unlikely to have commercial significance. [6] 1.4 Mechanism of action: â€Å"Ibuprofen is an NSAID which is believed to work through inhibition of cyclooxygenase (COX), thus inhibiting prostaglandin synthesis. There are at least 2 variants of cyclooxygenase (COX-1 and COX-2). Ibuprofen inhibits both COX-1 and COX-2. It appears that its analgesic, antipyretic, and anti-inflammatory activity is achieved principally through COX-2 inhibition; whereas COX-1 inhibition is responsible for its unwanted effects on platelet aggregation and the GI mucosa†. The role of the individual COX isoforms in the analgesic, anti-inflammatory, and gastric damage effects of NSAIDs is uncertain and different compounds cause different degrees of analgesia and gastric damage. 1.5 Absorption and metabolism: Ibuprofen is quite rapidly absorbed when it is admistered orally we can witness the peak plasma levels are obtained withan 2hours time.† As with most of these acidic NSAIDs , ibuprofen(pka=4.43) is extensively bound to the plasma proteins(99%) and will interact with other acidic drugs which are protein bound. Metabolism occur rapidly and the drug is nearly completely excreted in the urine as UN changed drug and oxidative metabolites with in 24 hrs following administration†. Metabolism involves primarily ω-1and ω-2 oxidation of the Ï -iso butyl side chain, followed by alcohol oxidation of the primary alcohol resulting from the ω-oxidation to the corresponding carboxylic acid. All metabolites are essentially in active. When Ibuprofen id administered as the individual enantiomers, the major metabolites isolated are the (+)-isomers regardless of the configuration of the administered enantiomer.intrestingley, the (R)(-)-enantiomer is inverted to the (S)-(+)-enant iomer in vivo, accounting for the observation that the two enantiomers are bioequivalent In vivo. 1.6 Ibuprofen uses: Ibuprofen is used to relief the symptoms of a wide range of illnesses such as headaches, backache, period pain, dental pain, neuralgia, rheumatic pain, muscular pain, migraine, cold and flu symptoms and arthritis. Recently evidence has emerged suggesting that ibuprofen is effective in the treatment of Alzheimers disease. 1.7 Ibuprofen side effects Ibuprofen is regarded as the first choice drug in its class due to the low number of side effects and complications associated with it. The most frequent type of adverse reaction occurring with ibuprofen is gastrointestinal. In clinical trials, the percentage of patients reporting one or more gastrointestinal complaints ranged from 4% to 16%. Common Side Effects: stomach upset or irritation Infrequent Side Effects: nausea and/or vomiting, constipation, diarrhoea Rare Side Effects: skin irritations, drowsiness, gastrointestinal bleeding Ibuprofen has the lowest incidence of gastrointestinal adverse effects, reactions of all the non selective NSAIDS. However this only holds true in case of lower doses of ibuprofen, so over the counter preparation of ibuprofen are generally labelled to advise a maximum daily dose of 1,200 mg. 1.8 Risks involved 1.8.1 Cardiovascular Risk: Along with several other NSAIDs, ibuprofen has been implicated in elevating the risk of myocardial infarction, particularly among those chronically using high doses. 1.8.2 Risks in Pregnancy: Ibuprofen consumption should be avoided in late pregnancy due to risk of premature closure of the ducts arteries in the fetal heart. 1.8.3 Risks in Inflammatory Bowel Disease â€Å"Ibuprofen should not be used regularly in individuals with Inflammatory Bowel Diseas (IBD-Crohns Disease and Ulcerative Colitis)due to its ability to cause gastric bleeding and form ulceration in the gastric lining. Drugs such as Advil should be avoided in persons afflicted with IBD. Pain relievers such as Tylenol (containing acetaminophen) or drugs containing Codeine (which slows down bowel activity) are safer methods than Ibuprofen for pain relief in IBD†. Ibuprofen is also known to cause worsening of IBD during times of a flare-up, thus should be avoided completely. 1.8.4Drug-Drug Interactions Ibuprofen is associated with several suspected or other probable interactions that can affect the action of other drugs .Ibuprofen leads to the increased levels of lithium leading to the reduction of lithium excretion from the kidneys, and this may lead to lithium toxicity. Ibuprofen may lead to the lowering of blood pressure because prostaglandins play an important role in reducing the blood pressure. Ibuprofen is used in combination with amino glycosides for e.g.: The blood levels of gentamycin may increase presumably because the elimination of amino glycosides from the body is reduced and may lead to amino glycoside side effect. 1.9. Absorption and Metabolism Ibuprofen is rapidly absorbed on oral administration with peak plasma levels being generally attained with in 2hrs. As with most of these acidic NSAIDs , ibuprofen(pka=4.43) is extensively bound to the plasma proteins(99%) and will interact with other acidic drugs which are protein bound. Metabolism involves primarily ω-1and ω-2 oxidation of the Ï -iso butyl side chain, followed by alcohol oxidation of the primary alcohol resulting from the ω-oxidation to the corresponding carboxylic acid. All the metabolites are essentially inactive. The (R)(-)-enantiomer is inverted to the (S)-(+)-enantiomer in vivo, accounting for the observation that the two enantiomers are bioequivalent In vivo. 1.9 Mechanism of Action Ibuprofen is an NSAID which is believed to work through inhibition of cyclooxygenase (COX), thus inhibiting prostaglandin synthesis. Prostaglandins are produced in response to injury or certain diseases 2 variants of cyclooxygenase (COX-1 and COX-2). Ibuprofen inhibits both COX-1 and COX-2. It appears that its analgesic, antipyretic, and anti-inflammatory activity is achieved principally through COX-2 inhibition; whereas COX-1 inhibition is responsible for its unwanted effects on platelet aggregation and the GI mucosa. The role of the individual COX Isoforms in the Analgesic, Antiinflammatory, and the Gastric damage and affects of NSAIDs is uncertain and different degrees of Analgesia and Gastric damage occur. 1.10 Controlled Release Mechanisms Controlled release implies regulation of the delivery of a a drug by a device the control is aimed at delivering the drug at a specific rate for a definite period of time independent of the local environments. Controlled release may also incorporate methods of promote localization of drug at an active site. Site specific and targeted delivery systems are the descriptive term used to denote this type of control. The periods of delivery are much longer than in case of sustained release and may vary from days to years. Controlled release mechanism is designed to release the drug in vivo according to predictable rates that can be verified by in-vitro measurements. Controlled release technology implies a quantities understanding of the physic chemical mechanism of drug availability to the extent that the dosage form release rate can be specified. Potential development s and new approaches to oral controlled release drug delivery systems, intragastric floating tablets, Trans mucosal tablets and micro porous membrane coated tablets . An example of application to the controlled release technology to dosage form design consists of a polymer matrix in which a drug containing solution is dispersed in the form of micro cells. The barrier permeability and the drug solubility in the dispersed solution are variables that can be adjusted to provide predictable drug release rates. All pharmaceutical dosage forms should be controlled release formulations -with rate specified and bioavailability assured by the drug delivery design. There are three types of controlled release mechanisms: Ø Diffusion Ø Swelling Ø Degradation 2 .Palmitic acid Palmitic acid,CH3(CH2)14COOH or hexadecanoic acid in IUPAC nomenclature, is one of the most common saturated fatty acids found in animals and plants. As its name indicates, it is a major component of the oil from palm trees (palm oil and palm kernel oil). Palmitate is a term for the salts or esters of palmitic acid. The palmitate anion is the observed form of palmitic acid at physiological pH. CAS number 57-10-3 Molecular formula C16H32O2 Molar mass 256.42 g/mol Appearance White crystals Density 0.853 g/cm3 at 62  °C Melting point 63-64  °C Boiling point 351-352  °C[2] 215  °C at 15 mmHg Solubility in water Insoluble 2.1 Biochemistry â€Å"Palmitic acid is the first fatty acid produced during lipogenesis (fatty acid synthesis) and from which longer fatty acids can be produced. Palmitate negatively feeds back on acetyl- CoA carboxyl(ACC) which is responsible for converting acetyl-CoA to malonyl-CoA which is used to add to the growing acyl chain, thus preventing further palmitate generation. Reduction of palmitic acid yields cetyl alcohol†. 2.2 Uses Derivatives of palmitic acid were used in combination with naphtha during World War II to produce napalm (aluminum naphthenate and aluminum palmitate). [6] â€Å"The World Health Organization claims there is convincing evidence that dietary intake of palmitic acid increases risk of developing cardiovascular diseases. However, possibly less-disinterested studies have shown no ill effect, or even a favorable effect, of dietary consumption of palmitic acid on blood lipids and cardiovascular disease, so that the WHO finding may be deemed controversial.[8] However, another study showed that palmitic acid has no hypercholesterolaemic effect if intake of linoleic acid is greater than 4.5% of energy. On the other hand, it was shown that, if the diet contains trans fatty acids, the health effects are negative, causing an LDL cholesterol increase and HDL cholesterol decrease†. â€Å"Recently, a long-acting anti-psychotic medication, paliperidone palmitate (marketed as INVEGA Sustenna), used in the treatment of schizophrenia, has been synthesized using the oily palmitate ester as a long-acting release carrier medium when injected intramuscularly. The underlying method of drug delivery is similar to that used with decanoic acid to deliver long-acting depot medication, in particular, neuroleptics such as haloperidol decanoate†. 3 .Pluronic F-127 Pluronic F127 is a difunctional block copolymer surfactant terminating in primary hydroxyl groups. A non-ionic surfactant that is 100% active and relatively nontoxic. 3.1 Specifications Cloud point (10% aqueous)†¦.. >100 °C Color, APHA †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 120 max. Water, weight %†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. Cast Solid-0.4 max. Prill/Micropastille-0.75 max. pH (2.5% aqueous)†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 6.0 7.0 3.2 Typical physical properties Form†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. Cast solid /Prill /Micropastille Average molecular weight†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.†¦ 12600 Specific gravity, 77 °/25 °C†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 1.05 Viscosity, cps at 77 °C †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 3100 Melt Point†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 56 °C Cloud point (1% aqueous)†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.†¦ >100 °C Foam height (Ross Miles, 0.1% aqueous at 50 °C)†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 40 mm Surface tension (0.1% aqueous)†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 41 dynes/cm at25 °C HLB†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 18 − 23 Solubility in water at 25 °C†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. >10% Wetting, Draves Sink Time (3-gm hook, 0.1% aqueous at 25 °C)†¦.. >360 seconds â€Å"Pluronicf-127 is polymer with an additional property in aqueous solution which will covert from its liquid state to that of a non fluid hydrogel, which is a main characteristic of the protein drug delivery system†.Pluronic-f127 is also considered as an Thermo Reversible Gelatine of the co-polymer f127 whose generic name is 407 in water makes it an unique candidate for Microencapsulaton application â€Å"Pluronic-f127 is a surfactant molecule with highly beneficial characteristics that makes it a strong candidate for protein drug delivery system. Its interaction with the polypeptides is most likely of minimisation of potential energy by mutual exclusion of hydrophobic residues from the aqueous medium as was predicted by computer probing and verified by fluorescent probing†. 4. Microencapsulation This is a process by which very tiny droplets or particles of liquid or solid material are surrounded or coated with a continuous film of polymeric material. These micro-capsules have a number of benefits such as converting liquids to solids, separating reactive compounds, providing environmental protection, improved material handling properties. Active materials are then encapsulated in micron-sized capsules of barrier polymers (gelatin, plastic, wax, ). â€Å"The reasons for micro encapsulation are countless. In some cases, the core must be isolated from its surroundings, as in isolating vitamins from the deteriorating effects of oxygen, retarding evaporation of a volatile core, improving the handling properties of a sticky material, or isolating a reactive core from chemical attack. In other cases, the objective is not to isolate the core completely but to control the rate at which it leaves the microcapsule, as in the controlled release of drugs or pesticides†. The problem may be as simple as masking the taste or odour of the core, or as complex as increasing the selectivity of an adsorption or extraction. 4.1 Micro encapsulation techniques: *Physical methods of encapsulation > Rotary disk atomization > Fluid bed coating > Stationary nozzle co extrusion > Centrifugal head co extrusion > Submerged nozzle co extrusion > Spray drying > Pan coating * Chemical methods of encapsulation > Phase separation > Solvent evaporation > Solvent extraction > Interfacial polymerization > Simple and complex coacervation > In-situ polymerization > Liposome technology * Shell materials used for en capsulation > Proteins > Polysaccharides > Starches > waxes > Fats > Natural and synthetic polymers > Resins 4.2 Chemicals used in this experiment: Drug: IBUPROFEN Coating polymer: pvp and pluronic (f77) Phosphate buffer (7.4) Composition of phosphate buffer Ø Potassium chloride Ø Sodium chloride Ø Potassium di hydro ortho phosphate Sodium di hydro ortho phosphate 6. Freeze Drying: Freeze-drying (also known as lyophilisation or cry desiccation) is a dehydration process typically used to preserve a perishable material or make the material more convenient for transport. Freeze-drying works by freezing the material and then reducing the surrounding pressure and adding enough heat to allow the frozen water in the material to sublime directly from the solid phase to gas. There are several stages involved in the freeze drying process 6.1 Freezing stage: â€Å" The freezing process consists of freezing the material. In a lab, this is often done by placing the material in a freeze-drying flask and rotating the flask in a bath, called a shell freezer, which is cooled by mechanical refrigeration, dry ice and methanol, or liquid nitrogen. On a larger-scale, freezing is usually done using a freeze-drying machine. In this step, it is important to cool the material below its eutectic point, the lowest temperature at which the solid and liquid phases of the material can coexist. This ensures that sublimation rather than melting will occur in the following steps. Larger crystals are easier to freeze-dry. To produce larger crystals, the product should be frozen slowly or can be cycled up and down in temperature. This cycling process is called annealing. However, in the case of food, or objects with formerly-living cells, large ice crystals will break the cell walls (discovered byClarence Birdseye)†. Usually, the freezing temperatures ar e between -50  °C and -80  °C. The freezing phase is the most critical in the whole freeze-drying process, because the product can be spoiled if badly done. Amorphous (glassy) materials do not have an eutectic point, but do have a critical point, below which the product must be maintained to prevent melt-back or collapse during primary and secondary drying. 6.2 Primary drying: â€Å" Primary drying can reduce the moisture content of a freeze dried solid to around 0.5%. Further reduction can be effected by secondary drying. During the primary drying, the latent heat of sublimation must be provided and the vapour removed. enough heat is supplied to the material for the water to sublimate In this initial drying phase, about 95% of the water in the material is sublimated. This phase may be slow (can be several days in the industry), because, if too much heat is added, the materials structure could be altered†. 6.3 Secondary drying: The removal of residual moisture at the end o primary drying is performed by raising the temperature of the solid to as high as 50 °C or 60 °C. A high temperature is permissible for many materials because the small amount of moisture remaining is not sufficient to cause spoilage 6.4 Freeze drying advantages: Drying takes place at very low temperatures, so that enzyme action is inhibited and chemical decomposition, particularly hydrolysis, is minimised. The solution is frozen such that the final dry product is a net work of solid occupying the same volume as the original solution. Thus the product is light and porous. The porous form of the product gives ready solubility. There is no concentration of the solution prior to drying. Hence, salts do not concentrate and denature proteins, as occurs with other drying methods. As the process takes place under high vacuum there is little contact with air, and oxidation is minimized. 6.5 Freeze drying disadvantages: The porosity, ready solubility and complete dryness yield a very hygroscopic product. Unless products are dried in their final container and sealed in situ, packaging requires special conditions. The process is very slow and uses complicated plant, which is very expensive. It is not a general method of drying, therefore, but is limited to certain types of valuable products which, because of their heat sensitivity, cannot be dried by any other means. 7 Apparatus used for the experiment : 7.1 Uv_visible spectroscopy: â€Å" A diagram of the components of a typical spectrometer is shown in the following diagram. The functioning of this instrument is relatively straightforward. A beam of light from a visible and/or UV light source (colored red) is separated into its component wavelengths by a prism or diffraction grating. Each monochromatic (single wavelength) beam in turn is split into two equal intensity beams by a half-mirrored device†. One beam, the sample beam (colored magenta), passes through a small transparent container (cuvette) containing a solution of the compound being studied in a transparent solvent. The other beam, the reference (colored blue), passes through an identical cuvette containing only the solvent. The intensities of these light beams are then measured by electronic detectors and compared. The intensity of the reference beam, which should have suffered little or no light absorption, is defined as I0. The intensity ofthe sample beam is defined as I. Over a short perio d of time, the spectrometer automatically scans all the component wavelengths in the manner described. The ultraviolet (UV) region scanned is normally from 200 to 400 nm, and the visible portion is from 400 to 800 nm. [11] Components of UV_ visible spectroscopy 7.2 Instrumentation: Source of light: The best source of light that which is more stable more intense and which gives range of spectrum from 180-360nm.The different sources available are: Hydrogen discharge lamp:It is more stable robust and widely used.It gives radiation from 120-350nm.The lamp consist of hydrogen under pressure. Deuterium lamp: It is similar to hydrogen discharge lamp, but filled with deuterium in the place of hydrogen.It offers 3-5 times more intensity than other types.This is most widely used but expensive. Xenon discharge lamp: In this lamp, xenon at 10-30 atmospheric pressure is filled in and has two tungsten electrodes. The intensity is greater than hydrogen discharge lamp. Mercury arc: This contains mercury vapour and offers bands which are sharp.The spectrum is not continuous. Monochromaters: â€Å"Grating monochromaters are used, filters and prism monochromaters are not used because of low resolution.On the other hand gratings provide a band pass of 0.4 to 2nm.Hence they are more widely used incase of expensive spectrophotometers.The mirrors ,gratings are made up of quartz since glass absorbs uv radiation from 200-300nm.Mirrors are front surfaced to prevent absorption of radiation†. Sample Cells: â€Å"The design of sample cells used is similar to that used in colorimetry expect that it is made up of quartz. Quartz cells only must be used in uv spectroscopy since glass cells will absorb uv radiation.The pathlength of the cells are 10mm or 1cm†. Solvents: â€Å"solvent plays an important role in uv spectra, since compound peak could be obscured by solvent peak.Hence the solvent for a sample is selected in such a way that solvent neither absorbs in the region of measurement nor affects the absorption of the sample†. Detectors: Although any one of the detectors used in colorimetry can be used, photomultiplier tubes are mainly used, since the cost of such UV spectrophotometers are high and more accurate measurements are to be made. Single beam and double beam UV spectrophotometers are used. 7.3.Beers law (related to concentration of absorbing species): Beers law states that the intensity of beam of monochromatic light decreases exponentially with increase in the concentration of absorbing species arithmetically. Lamberts law (related to thickness/ path length of absorbing species): Lamberts law states that the rate of decrease of intensity (monochromatic light) with the thickness of the medium is directly proportional to the intensity of incident light. Beer-Lambert Law: The beer lamberts law states that absorbance of a solution is directly proportionally to the concentration of the solution. A = −log_{10}(I/I_0) = epsiloncdot ccdot L, The beer-lambert law is useful for characterizing of the compounds but does not hold as a universal relationship for the concentration and absorption of all species. Applications: It is mainly used in the detection of impurities. It is used in the structure elucidation of organic compounds. And also used in the analysis of organic compounds. Detrmination of molecular weight. Determination of dissociation constant of acids and bases. 7.4 Flow through dissolution apparatus: â€Å"The flow-through cell is a suitable method for dissolution studies of poorly soluble drugs. The dissolution can be influenced by changing parameters in the apparatus and by changing the physical properties of the drug and the medium used. In this study the dissolution of ibuprofen was examined†. Results showed that a smaller particle size gave a higher dissolution rate. With a dose of 50mg a higher percent dissolved was obtained compared to a dose of 100mg. However, a larger mass (mg) was dissolved when the dose of 100mg was used. When using a cell diameter of 12mm instead of a cell diameter of 22.6mm the dissolution rate increased. A larger dissolution rate was also obtained when the flow of the medium was increased. Finally the effect of changing medium was examined. Results showed that by including a surfactant to the medium a drastic increase of the dissolution rate was obtained. The flow-through cell has since the 90s been used as an alternative method for dissolution studies . It has some advantages over previous dissolution methods. It is easier to retain sink condition, i.e. to keep a sufficiently low concentration in the remaining solution. This makes it possible to keep a constant diving force (=concentration difference) the whole time during the release experiment. The concentration should not exceed one third of the saturated. The medium can be changed automatically during the study which is very useful in in vitro in vivo studies . Previous studies have showed the importance of deaeration of the dissolution medium, how the packing of the cell can influence the dissolution and that the results obtained with the flow-through cell are more reproducible than obtained with previous methods as dissolution baths In this study the dissolution of ibuprofen was examined in the flow-through cell. Six parameters were of interest: The packing of the cell The particle size of the drug The dose The volume flow of the medium through the cell The cell diameter The medium Desirable results were good reproducibility, i.e. small standard deviation between tests and cells, and to maintain sink condition during the experiment. Advantages : Laminar flow characteristics over a wide range of solvent flow rates Infinite sink ideal for low solubility drugs Differential rather than cumulative time profile o

evolution of the horse Essay -- essays papers

evolution of the horse ï » ¿For many people, the horse family remains the classic example of evolution. As more and more horse fossils have been found, some ideas about horse evolution have changed, but the horse family remains a good example of evolution. In fact, we now have enough fossils of enough species in enough genera to examine details of evolutionary change. Evolution does not occur in a straight line toward a goal, like a ladder; rather, evolution is like a branching bush, with no predetermined goal. Horse species were constantly branching off the evolutionary tree and evolving along various unrelated routes. There’s no discernable straight line of horse evolution. Many horse species were usually present at the same time, with various numbers of toes, and adapted to various diets. In other words, horse evolution had no inherent direction. We only have the impression of straight line evolution because only one genus happens to still be alive, which deceives some people into thinking that the one genus was somehow the target of all the evolution. Instead, that one genus is merely the last surviving branch of a once mighty and sprawling bush. Tracing a line of descent from Hyracotherium to Equus reveals several apparent trends: reduction of toe number, increase in size of cheek teeth, lengthening of the face, and increase in body size. But these trends are not seen in all of the horse lines. On the whole, horses got larger, bu...

American politician Essay

Assignment details: One of the themes in ‘Crucible’ is the conflict between good and evil. Who would you say were the good people and how is their goodness shown? Who would you say were the evil people and how is their evil shown? Arthur Millers play ‘The Crucible’ was first produced in the year 1953 in the time of the McCarthy political ‘Witch-Hunt’ in the US. The 1950’s in America was an extremely controversial era due to the ‘House Of Un-American Activities Committee’ under the chairmanship Senator Joseph Raymond McCarthy who was an American politician. This organization had the power to investigate any movement or person who threatened the safety of the state. McCarthy first attracted national attention in February 1950 with the charge that Communists had infiltrated the Department of State. Although his accusations were never substantiated, during the three years that followed he repeatedly pointed the finger at various high-ranking officials of subversive activities. During the first five to ten years after World War II the two economical blocks the USA and the USSR, faced each other in a ‘cold’ war which created fear and worry in America that the philosophy of Communism was spreading and would eventually undermine and destroy Capitalism, the American’s ideal way of life. People were blamed in all types of situations such as accidents, misfortunes, or catastrophes of any kind. Whole societies were whipped up into panic by the fear that evil forces were out to destroy them. The play ‘The Crucible’, although concerned with the Salem witchcraft trials, was actually aimed at the widespread congressional investigation of subversive activities in the United States. The event at that time seemed particularly similar to the 1692 ‘Witch-Hunts’ in Salem, Massachusetts, United States where the lies of a group of adolescent girls, caused many people to be imprisoned or put to death. The play deals with many aspects of life, like individual conscience, the abuse of power, the conflict between good and evil and the most obvious of all Witchcraft, as many characters in the play were accused of being associated with the devil. At the time the play was set, if anyone was said to be involved with the devil, their future and their families future would be in serious jeopardy. It wouldn’t even matter if the person(s) were innocent if someone said it was true then it was said to be true as this was the most serious allegation at the time. The only option you had if you wanted to live was deny the charges against you and name other people supposedly involved in witchcraft and devil worshipping. Another of the many serious themes in Arthur Millers, ‘The Crucible’ was individual conscience where many people just followed and agreed with what others had said. For example, if someone accused another as being involved in witchcraft, the entire community would agree. This was because people were scared because if anyone disagreed with the allegations they would also be accused of being involved in witchcraft. In the play, John Proctor and Rebecca Nurse stood up for their beliefs even though they knew that they would be executed. This shows courage, self-pride and integrity, as they would rather risk their lives than cause shame upon themselves and their family’s, unlike other characters who tried to pass the blame like Abigail and Tituba. The abuse of power is a significant subject in the play, as people with too much of it end up doing morally wrong things unto others. This is shown in the opening acts of the play when Reverend Parris suspects witchcraft. When Reverend Hale, an authority on witchcraft, arrives at the house, he tries to rouse Betty about the incident in the woods, without success. He then begins to question Abigail Williams who is afraid and accuses Tituba of conjuring the devil. Tituba is brought in and coerced into submitting to the allegations made against her.

Red Scarf Girl Essay

Red Scarf Girl Essay The Cultural Revolution was a time of much confusion in china. The memoir Red Scarf Girl by Ji-li Jiang illustrates the chaos of that time. Ji-li’s experiences during this time period led to her point of view changing. Ji-li starts the Cultural Revolution full of progressive thoughts, but this quickly turns to confusion, and leads to an important choice, something that impacts the rest of her life. In the beginning of the Cultural Revolution, Ji-li is full of thoughts of moving forward, and helping Mao’s work to succeed. She believes that she can make a difference in the world. Ji-li helps with the â€Å"Destroy the Four Olds† campaign, and is nearby when a shop sign is smashed for having a name that does not concede with the communist principles. This gives her a feeling of kinship with everyone there. â€Å"Although what we had smashed was no more than a piece of wood, we felt like we had won a victory in a real battle. †(Pg. 24). But even as she was aiding the revolution, her thoughts soon turned to confusion and frustration with the policies of the Communist party. In short, Ji-li begins the revolution full of progressive thoughts but she soon becomes puzzled with the parties policies. As the glossiness of the revolution begins to fade, Ji-li becomes perturbed with the rules of the Communist party, as the Red guards constantly contradict them. The paper says that â€Å"a historic counterrevolutionary† had â€Å"confessed and had a positive attitude, he was pardoned†(Both on Pg. 176). However, this is opposite from how Uncle Zhu was treated after his confession, as he was pushed for more information to make Ji-li’s father confess. All this chaos led to Ji-li having to make a choice between her father, or Chairmen Mao, because the Red guards needed her to be a witness of her father’s antirevolutionary activates to convict her father, and if she did not she would be stuck with a bad class status. This demonstrates the immense confusion there was during that time. In summary, the instability during the Cultural Revolution led to Ji-li having to make an important choice. As the novel draws to an end, Ji-li has am important choice to make; She can support her family or support Mao and the revolution. Ji-li face great pressure from the red guards and also from the part of herself that wants to cure her black class status. However she chooses her family because â€Å"(it is) too precious to forget and too rare to replace†(Pg 263). However, this choice has consequences for her and her family. She was prevented from becoming an actress because of her class status, and her mother was forced to write self-critism reports because she would not break with her husband. In brief, Ji-li has a vital choice to make, and chose her family, but this choice had consequences. How does Ji-li’s point of view change during the Cultural Revolution? It shifts from believing that Mao was most important, to believing that her family and responsibilities are most important. â€Å"Once my life had been defined by my goals: to be a Da-dui-zhang, to participate in the exhibition, to be a Red guard. They seemed unimportant to me now. Now my life was defined by my responsibilities. I had promised to take care of my family, and I would renew that promise every day†(Pg. 263) This shows how her view point has shifted from herself and Mao, to her family. Ji-li had a lot courage to be able to do what she did, and I think that it is her courage that got her this far.

Free Essays on Greenhouse Effect

Greenhouse Effect On a bright, cool day, most people notice the sun’s rays as feeling good on their skin. By nature, many of us even try to stay on the sunny side of the street while walking. The sun is 93 million miles away from earth and its energy travels to us in moving waves called radiation. The energy becomes heat, light and other energy too. Visible sunlight allows us to see the world around us, but there is invisible sunlight, too. These rays can’t be seen, but some can be felt as heat. They are called ultraviolet rays, and they are what changes the appearance of the skin, like wrinkles and even cancer. I discovered a blanket of gases known as the atmosphere surrounding our planet. It is what provides us with the air we breathe, and it protects us from the full blast of the sun’s radiation. Way up there in the part of the atmosphere called the stratosphere, a layer of gas called ozone, filters out most of the sun’s damaging ultraviolet rays. This happens about five miles to 25 miles above the surface of Earth (Bright 14-15). Only about one- millionth of our atmosphere is made up of ozone. But it has an important job. Ozone can absorb the part of the sunlight called ultraviolet radiation. Some ultraviolet radiation still gets through, but not enough to do serious damage to Earth. Because if it got through, life as we know it would be impossible. But there is a serious problem in the ozone layer. Each year, a large hole appears in it. It isn’t an actual hole, like a hole in a pocket, but a layer getting thinner as it shows up on the satellite pictures. The â€Å"hole† is right over Antarctica, covering an area about the size of the United Stat... Free Essays on Greenhouse Effect Free Essays on Greenhouse Effect Greenhouse Effect On a bright, cool day, most people notice the sun’s rays as feeling good on their skin. By nature, many of us even try to stay on the sunny side of the street while walking. The sun is 93 million miles away from earth and its energy travels to us in moving waves called radiation. The energy becomes heat, light and other energy too. Visible sunlight allows us to see the world around us, but there is invisible sunlight, too. These rays can’t be seen, but some can be felt as heat. They are called ultraviolet rays, and they are what changes the appearance of the skin, like wrinkles and even cancer. I discovered a blanket of gases known as the atmosphere surrounding our planet. It is what provides us with the air we breathe, and it protects us from the full blast of the sun’s radiation. Way up there in the part of the atmosphere called the stratosphere, a layer of gas called ozone, filters out most of the sun’s damaging ultraviolet rays. This happens about five miles to 25 miles above the surface of Earth (Bright 14-15). Only about one- millionth of our atmosphere is made up of ozone. But it has an important job. Ozone can absorb the part of the sunlight called ultraviolet radiation. Some ultraviolet radiation still gets through, but not enough to do serious damage to Earth. Because if it got through, life as we know it would be impossible. But there is a serious problem in the ozone layer. Each year, a large hole appears in it. It isn’t an actual hole, like a hole in a pocket, but a layer getting thinner as it shows up on the satellite pictures. The â€Å"hole† is right over Antarctica, covering an area about the size of the United Stat... Free Essays on Greenhouse Effect The greenhouse effect occurs when gases such as methane, carbon dioxide, nitrogen oxide and CFCs trap heat in the atmosphere by acting as a pane of glass in a car.  ³The glass ² lets the sun light in to make heat but when the heat tries to get out the gases absorb the heat. Holding this heat in causes heat waves, droughts and climate changes which could alter our way of living. The main gases that cause the greenhouse effect are water vapor, carbon dioxide (CO2), and methane which comes mainly from animal manure. Other gases like nitrogen oxide and man made gases called chloroflurocarbons get caught in the atmosphere as well. The decay of animals and respiration are two main but natural sources of carbon dioxide. In my opinion we people of the whole world should try and slow down the emmission of greenhouse gases and/or find ways to balance the gases so the climate doesn't change so rapidly. If it did we would be forced to adapt to the new climate that we brought upon our selves. If we had a international cooperation to put a damper on the production of chloroflurocarbons and slowed down the use of fossil fuels it would dramatically slow down the process of "global warming." Over the last 100 years the global temperatures have been increasing slowly but steadily. Since 1980 the temperature has risen 0.2 degrees C (0.4 degrees F ) each decade. Scientists predict that if we continue putting the same amount of gas into the atmosphere by the year 2030 the temperature will be rising as much as 0.5 degrees C (0.9 degrees F ) or more per decade. Over all the global temperature could rise anywhere from 5 to 9 degrees over the next fifty years. If the temperatures do rise as predicted several things could happen. The increases of temperature could alter the growth of crops in areas near the equator due to insufficient rain and heat. This could really hurt countries that rely on imported food. With the high temperatures the polar ice caps could m... Free Essays on Greenhouse Effect The earth’s climate is predicted to change because human activities are altering the chemical composition of the atmosphere through the build up of greenhouse gases – primarily carbon dioxide, methane, and nitrous oxide. Energy from the sun drives the earth’s weather and climate, and heats the earth’s surface. This causes the earth to radiate the energy back into space. Atmospheric greenhouse gases (water vapor carbon dioxide, and other gases) trap some of the outgoing energy, retaining heat similar to the glass panels of a greenhouse. Without this natural â€Å"greenhouse effect,† temperatures would be much lower than they are now, and life as known today would not be possible. Instead, thanks to greenhouse gases, the earth’s average temperature is a more hospitable 24 C. However, problems may arise when the atmospheric concentration of greenhouse gases increases. Since the beginning of the industrial revolution, atmospheric concentrations of carbon dioxide have increased nearly 30%. Methane concentrations have more than doubled, and nitrous oxide concentrations have risen by about 15%. Due to the concentrations increasing the heat-trapping capability of the earth’s atmosphere is enhanced. Greenhouse gas concentrations are increasing. Scientists generally believe that the combustion of fossil fuels and other human activities are the primary reason for the increased concentration of carbon dioxide. Plant respiration and the decomposition of organic matter release more than 10 times the CO released by human activities; but these releases have always been in balance with the carbon dioxide absorbed by plant photosynthesis. What has changed in the last few hundred years is the additional release of carbon dioxide by human activities. Energy burned to run cars and trucks, heat homes and businesses are responsible for about 80% of society's carbon dioxide emissions and about 20% of global nitrous oxide ...

Music Censorship essays

Music Censorship essays Eventually it was discovered that God did not all want us to be the same. This was bad news for the governments of the world...Mankind must be made more uniformly if THE FUTURE was going to work out... It was about this time that someone came up with the idea of TOTAL CRIMINALIZATION, based on the principle that if we were ALL crooks we could at least be uniform to some degree in the eyes of the law. Shrewdly our legislators calculated that most people were too lazy to perform REAL CRIME. So new laws were made making it possible for anyone to violate them at any time of the day or night... which is one of the reasons why music was eventually made ILLEGAL. - Frank Zappa This quote from Frank Zappa is about how music and lyrics and censorship are so controversial that it has come to the point where people want to make music illegal. Censorship in music is a topic that has brought about much controversy in the past two decades. There have been many different arguments on the topic, however the question still remains if it should be censored or not. Some people believe that music should be censored so all audiences can hear it without it containing any controversial lyrics. Others believe it should not be censored and musical artists should be able to sing, speak, rap, or rhyme freely without anyone censoring them. People that think music should be censored believe that some of the language musical artists use is vulgar, obscene, and crude. Also the fact that music is played on medias such as radio and television, which are free to listen to by all audiences, there are many parents that would not wish for their kids to hear foul language. So on radio and television any controversial language is either silenced, edited out by a soft sound, or some artists make 2 versions of their songs; one that is made for the artists album, which is uncensored, and one for the television and radio with any ...

Business Model Innovation

This growth has largely been driven by socio-economic and political imperatives to improve rural livelihood and by technological innovation. Based on a content analysis of 232 scholarly articles, the literature is categorized into four focal lenses: technology, institutional, viability and user-centric. We ? nd that the ? rst two dominate the RE debate. The viability lens has been used less frequently, whilst the user-centric lens began to engage scholars as late as 2007. However, there are business models that avoid this problem: in Bangladesh, the operational risk remained with Grameen Shakti, although ownership was immediately transferred to the customer (Alamgir, 1999). We found no single RE paper that explicitly incorporated these replacement costs and associated risks in their analysis of the purchasing decision. Â  Reliability The reliability of electricity provision is an important parameter in the customer’s decision-to-connect. We understand reliability as a combination of quality, service level and suf? ciency (timely delivery of desired quantity). Peters et al. (2010) con? rm that locally conceived projects could overcome barriers that would otherwise arise, while Hossein Mondal et al. (2010) state that involving local stakeholders will facilitate RET diffusion. Involving the community from the conception stage thus reduces the ‘not invented here syndrome’ and improves acceptance of new technologies. They conclude that technology push projects seldom involve local communities and that this lack of involvement might be one of the crucial reasons for their demise. On an outcome level, Reiche et al. (2000) state that giving local communities ownership will also increase sustainability.

Anishinabee social movment Research Paper Example | Topics and Well Written Essays - 1250 words

Anishinabee social movment - Research Paper Example For instance, Japanese immigrants were deported from the country as soon as the war ended. Blacks, women and especially the aboriginals faced racial discrimination from white settlers. The Indian Act, which was enacted in 1876, ensured that the government would control all lands belonging to the natives. It also aimed at assimilating Indians into western culture and abolishing their own customs. However, after serious coercing from Indian movements, the act was changed in favor of the natives in 1951. Key customs and cultural ceremonies that had been banned, such as pow-wow and potlatches, were reenacted. The natives, for the first time were allowed to own and drink alcohol; though the drinking was restricted to Indian reserves. By this time majority of Indians were still not allowed to vote. The few who enjoyed the benefits of voting were the enfranchised Indians, who were completely assimilated into the western culture. (Canada in the Making, n.d.) However, this rule was also abolished in 1960 when non-enfranchised Indians were allowed to vote in federal elections. Though it seemed that Indians were headed for the right direction, they were denied the right to govern themselves. Another blow came when Pierre Trudeaus came to power in 1968. Issuing a White Paper, he openly opposed treaty negotiations with the aboriginals. Furthermore, his government clashed with the natives on the land rights. As a result, they responded to him with a document dubbed Citizen Plus in 1970, later known as the Red Paper. Backed by a delegation of aboriginals and other Canadian citizens, the paper opposed all policies of the new regime. Eventually, the government accepted their radical proposals. (Canada in the making, n.d.) At the onset of the ‘70s, there were rapid reforms that uplifted several discriminatory laws affecting aboriginals. For instance, in 1969 Joseph Drybones was convicted for drinking outside the reserves. He fought the case up

Islamic architecture 2 Essay Example | Topics and Well Written Essays - 1250 words

Islamic architecture 2 - Essay Example The beginning of Islamic Architecture takes place with the construction of the Great Mosque at Cordoba in the Iberian Peninsula. Muslims as well as the Christians consider it a wonder of the medieval ages. The construction of great mosque of Cordoba initiated in between â€Å"784 and 786 at the site of a Christian Visigothic Church† 2. In specific, Abd ar-Rahman acquired the church, and subsequently, his grandchildren modified it over two centuries to transform it into a religious entity, starting in 784. The mosque itself was built in four phases  and is observed as a trademark of sacred Islamic architecture. Ferdinand III king of Castile took over Cordoba in 12363 and sanctioned the Great Mosque as the cathedral of city, Mezquita, and used it with negligible changes for the next three centuries4. In 929, when Abd al-Rahman III5 confirmed himself caliph, and the Spanish Umayyads attained the peak of their supremacy. The caliph built the fortress capital of Madinah al-Zahra about thirteen kilometers Northwest of Cordoba, with its focus to impress the world and exhibit its massive military. He made it his empires managerial and legislative headquarters. The construction in Medina al-Zahra proceeded speedily, particularly since Abd al-Rahman III put in one third of the state revenues in its progression. Finally, he brought in the largest and most grand secular venture of his period, which stayed matchless irrespective of the numerous cities founded until its end. As the caliphate fell in the 11th century, the city then was sacked and smoldered. The new Minister of Caliph Hisham II, Vizir-ul-Mansur6 shifted his concentration towards the east of Cordoba and deserted the city during his reign. Later, the Berber troops destroyed this palace-city in 10107. The Great Mosque of Cordoba is most illustrious for its gigantic arches, with approximately eight hundred fifty six pillars of natural stones. These legendary

Evaluate critically the challengs that human resource professionals Essay

Evaluate critically the challengs that human resource professionals face when recruiting a flexible workforce - Essay Example In this paper we will discuss the various challenges faced by HR professionals in today's business world and how to overcome those challenges. Top HR professionals frequently say that their corporation's employees are its primary and vital assets. Being prosperous at recruiting a flexible workforce variety of program engages recruiting and hanging on to the 'specially selected' employees in the ability pool. For the HR professional it does imply seeing outside of 'understandable' staffing techniques and settings for a flexible workforce, then finding out how to run human potential perceptively (Drucker 1974). It requires a growing wakefulness of how employees from diverse environments cope with ability, communiqu, in general business decorum, and be connected with their areas of association (Powell 2003). Recruiting workforce is a course of action that comes to pass in lots of stages in an organization. It requires HR professionals first to employ a proficient and skilled staff, then to provide accommodation to individual requirements in the context of the work group and the corporation (Powell 2003). Despite all the considered settlement ... Had 12 percent of the workforce willingly leave their jobs since the start of 2006 Noted that non-management workforce were the odds-on to leave their jobs (71 percent) Were worried about voluntary resignations (73 percent) Employed particular retention procedures (50 percent) This survey, conducted by CareerJournal, explains that workforce and HR professionals have a tendency to see eye to eye on the top rationales workforce prefer to put down their corporations: better payment (30% of workforce); job openings (27% of workforce); and world-weariness with the possibility for professional growth (21% of workforce). These percentages have somehow clearly shown the obvious challenges faced by the HR professionals in recruiting a flexible workforce. However, through a combination of exact questionings and a cautious human contact, human resources professionals are powerless to offer a series of constructive answers to employers all over the entire world (Kaplan and Norton 2006). As a result, an efficient human resources plan is actually required to add to the return on investment that lots of HR professionals can be expecting while hiring or recruiting their workforce. Evaluation Constant evaluation of staffing efforts is required to find out the worth of various methods and approaches, providing some stages of 'costing information', 'discovering potential hurdles', and 'show progresses' (Wilson and Adams). Certainly, with the appliance of sensitive means that assist to keep an eye on workforce as they progress in their job situations, human resources professionals are required to endow with exact evaluation systems as well as to their workforce recruitment functions. With the idyllic set of HR appliances, every worker in the

Ancient Egyptian Art, Painting, and Sculpture Research Paper

Ancient Egyptian Art, Painting, and Sculpture - Research Paper Example Source: http://www.crystalinks.com/egyptart.html Being that ancient Egypt was a religious nation, most of the paintings and sculptures during civilization encompass the goddesses, gods, and Pharaohs.3 These were religious leaders who were considered as divine and they were accorded much respect as they determined individual fate. The ancient arts were characterized by idea according to the outlined order. The arts consisted of clear and precise lines that combined with simple shapes and colors to create some manners of order and top bring balance in the Egyptian nation. Source: http://www.crystalinks.com/egyptart.html Similarly, ancient Egyptian arts had horizontal and vertical lines, which they used in maintaining proportions in the artistic works. The artists maintained both religious and political orders, as they were involved in their artistic works. They also drew figures into sizes not considering the painter’s point of view as it was meant to define the social hierarchy of situations. A good example of this can be depicted by drawing the figure of pharaoh to be bigger in the painting paying no respect to its location.4 It also applies to greater gods and lesser gods. Egyptian sculptures were made of clay, wood, metal and stones. These materials were readily available during the period and they were regarded precious in making sculptors at the time. The use of stones in making sculpture was the most plentiful as it was considered permanent because it is hard and was available in different colors which provided a wide choices. The ancient Egyptian sculptors were very distinctive in its nature in two different ways: it is characterized as cubic and frontal. This is because it takes the form of the cubes or the... This paper stresses that ancient Egyptians arts resembled the actual life situations and nature. They conformed to strict rules which represented their three dimensional forms. Most of the paintings if not all portrayed the figures and images of real life and nature as it was easily noticeable with keen observation. The drawings and paintings were very complete and pretty and they also represented real life situations. ancient Egyptian arts had horizontal and vertical lines, which they used in maintaining proportions in the artistic works. The artists maintained both religious and political orders, as they were involved in their artistic works. They also drew figures into sizes not considering the painter’s point of view as it was meant to define the social hierarchy of situations. A good example of this can be depicted by drawing the figure of pharaoh to be bigger in the painting paying no respect to its location. It also applies to greater gods and lesser gods. Egyptian scul ptures were made of clay, wood, metal and stones. These materials were readily available during the period and they were regarded precious in making sculptors at the time. The use of stones in making sculpture was the most plentiful as it was considered permanent because it is hard and was available in different colors which provided a wide choices. The ancient Egyptian sculptors were very distinctive in its nature in two different ways: it is characterized as cubic and frontal. This report makes a conclusion that the ancient Egyptian arts, paintings, and sculpture play an important role in the life of the Egyptian. The ancient arts have certain characters which makes them distinctive from other forms of arts of other countries. This has made them stand over period and preserve their arts.

Food and culcture Essay Example | Topics and Well Written Essays - 1500 words

Food and culcture - Essay Example 6). What it says is food has got major role in making people feel more attached. Older people say that if all members of the family eat food together at any time, whether it is in the morning or afternoon or at the time of dinner then it will provide more happiness in the family. Food has got such power. Food is most important to all human beings in order to live. The importance of food is great in certain celebrations such as marriage, birthday etc. In a society food can be used as a source for increasing the relationship with others. It can be made through exchanging food by the individuals. For example, it can be the neighbors sharing their food. This kind of activity will enrich the human relationship. Food has got important role in spiritual activities. Some people believe that offerings of some kinds of food to God will bring happiness to their life. Analyzing the relationship between food and culture, one can find that they are closely interrelated. Cultural significance of food and eating is based on social values, meaning and beliefs than the dietary necessities and nutritional standards. There exist a lot of examples and regularities for the selection of food. The eating practices are not a matter of physical needs. People eat in a particular social structured mode and there are distinct ideas about good and bad table behavior, correct and incorrect habits to present dishes and the importance of having a clear cut idea about the aptness of food for different functions. These way foods express the cultural significance, the social rank, traditions and also prosperity. Leach opines, â€Å"Food is an especially appropriate â€Å"mediator† because, when we eat, we establish, in a literal sense, a direct identity between ourselves (culture) and our food (nature).† (Fishburn, p. 57). Food is a significant element of

Evaluate critically the challengs that human resource professionals Essay

Evaluate critically the challengs that human resource professionals face when recruiting a flexible workforce - Essay Example In this paper we will discuss the various challenges faced by HR professionals in today's business world and how to overcome those challenges. Top HR professionals frequently say that their corporation's employees are its primary and vital assets. Being prosperous at recruiting a flexible workforce variety of program engages recruiting and hanging on to the 'specially selected' employees in the ability pool. For the HR professional it does imply seeing outside of 'understandable' staffing techniques and settings for a flexible workforce, then finding out how to run human potential perceptively (Drucker 1974). It requires a growing wakefulness of how employees from diverse environments cope with ability, communiqu, in general business decorum, and be connected with their areas of association (Powell 2003). Recruiting workforce is a course of action that comes to pass in lots of stages in an organization. It requires HR professionals first to employ a proficient and skilled staff, then to provide accommodation to individual requirements in the context of the work group and the corporation (Powell 2003). Despite all the considered settlement ... Had 12 percent of the workforce willingly leave their jobs since the start of 2006 Noted that non-management workforce were the odds-on to leave their jobs (71 percent) Were worried about voluntary resignations (73 percent) Employed particular retention procedures (50 percent) This survey, conducted by CareerJournal, explains that workforce and HR professionals have a tendency to see eye to eye on the top rationales workforce prefer to put down their corporations: better payment (30% of workforce); job openings (27% of workforce); and world-weariness with the possibility for professional growth (21% of workforce). These percentages have somehow clearly shown the obvious challenges faced by the HR professionals in recruiting a flexible workforce. However, through a combination of exact questionings and a cautious human contact, human resources professionals are powerless to offer a series of constructive answers to employers all over the entire world (Kaplan and Norton 2006). As a result, an efficient human resources plan is actually required to add to the return on investment that lots of HR professionals can be expecting while hiring or recruiting their workforce. Evaluation Constant evaluation of staffing efforts is required to find out the worth of various methods and approaches, providing some stages of 'costing information', 'discovering potential hurdles', and 'show progresses' (Wilson and Adams). Certainly, with the appliance of sensitive means that assist to keep an eye on workforce as they progress in their job situations, human resources professionals are required to endow with exact evaluation systems as well as to their workforce recruitment functions. With the idyllic set of HR appliances, every worker in the

Food and culcture Essay Example | Topics and Well Written Essays - 1500 words

Food and culcture - Essay Example 6). What it says is food has got major role in making people feel more attached. Older people say that if all members of the family eat food together at any time, whether it is in the morning or afternoon or at the time of dinner then it will provide more happiness in the family. Food has got such power. Food is most important to all human beings in order to live. The importance of food is great in certain celebrations such as marriage, birthday etc. In a society food can be used as a source for increasing the relationship with others. It can be made through exchanging food by the individuals. For example, it can be the neighbors sharing their food. This kind of activity will enrich the human relationship. Food has got important role in spiritual activities. Some people believe that offerings of some kinds of food to God will bring happiness to their life. Analyzing the relationship between food and culture, one can find that they are closely interrelated. Cultural significance of food and eating is based on social values, meaning and beliefs than the dietary necessities and nutritional standards. There exist a lot of examples and regularities for the selection of food. The eating practices are not a matter of physical needs. People eat in a particular social structured mode and there are distinct ideas about good and bad table behavior, correct and incorrect habits to present dishes and the importance of having a clear cut idea about the aptness of food for different functions. These way foods express the cultural significance, the social rank, traditions and also prosperity. Leach opines, â€Å"Food is an especially appropriate â€Å"mediator† because, when we eat, we establish, in a literal sense, a direct identity between ourselves (culture) and our food (nature).† (Fishburn, p. 57). Food is a significant element of

Does Gender or Sexuality Affect a Young Person’s Transition to Adulthood Essay Example for Free

Does Gender or Sexuality Affect a Young Person’s Transition to Adulthood Essay In this essay there will be a discussion about whether or gender effects the transition to adulthood. There will be a brief definition of gender and transition. There has been great debate over gender but there has been little about masculinity and femininity and the transition to adulthood. It will look at the transitions that gender goes through in relation to that of the past and present day. Then which will be compared if they have changed or continuously stayed the same. There will be theoretical discussion of the psychoanalytic and biosocial theory and how this helps us to understand if gender effects the transitions to adulthood. Being in school and going into the workforce will be examples of how these theories can be applied and explain again if the transitions to adulthood are effect by gender. Then to finished there will be a conclusion. When we think of gender we normal think of the sex of the person, so whether they are female or male. According to Mackenzie (2001:150) gender â€Å"relates to social divisions associated with notions of masculinity and femininity and such divisions vary according to changing contexts†. But is it as simple as this?! Gender is not just determined by whether you are male or female; it is a lot deeper than that as has a variety of aspects. These are gender assignment, gender role, gender identity and gender attribution. To become an adult there is considered to be five core transitions that a young person goes through. These are leaving home, completing school, entering the workforce, marriage and having children. This process is prolonged and varied compared to that of half a century ago. In comparison to then it takes longer for young adults to gain economic and psychological autonomy. According to Berlin et al (2010:20) â€Å" experiences in early adulthood now vary greatly b y gender, race, ethnicity and social class. In industrial society’s most men make the transition to adulthood by be able to go out and work. In comparison to some world cultures who make their transition through rituals. However, the passage form boy to man has become more complicated and hard to determine, which has cause issues which they are not mentally and physically prepared for flood et al(2007:666). Today there is contradiction and problems in relation to what it is to be a man is on the upraise and this is practically noticeable where there has been conflict, for example, in Northern Ireland (ibid). In Northern Ireland there is a tradition for men to live up the masculinity that was presented by other before them which has put pressure of the youths to be just the same. The homicide rates between 1969 to 2001 are a reflection of the phenomena that is associated with the transition of youth into adulthood and violence. There has been more studies on the gender norms is not new however there is significant difference in the amount of research on female and males. Morgan 1981 argues that ‘taking gender seriously’ means bring men back in. he stresses that if we accept that men is not the norm women the deviation and if we want to fully understand the life experiences and chances of all men and women we need to consider the social construction of both femininity and masculinity and focus our research and women and men experiences†. Marchbank Letherby( 2007:28) . Although it was not until the 20th century that subcultures were recognised as male due to the youth movement but still masculinity was not studied flood et all (2007:666). It is the belief of feminist that males disempowered women, according to McKinnon that there is system of power in which male dominances that oppresses women. Therefore, masculinity was seen as a problem. (Mackinnon, C. (1993) However Hearn argues that â⠂¬Å"In particular, it refers to the way in which particular forms of masculinity persist not just in relation to femininity, but also to other forms of masculinity. Accordingly, different forms of masculinity exist in relations of power, that may be characterized as hegemonic or subordinated in relation to one another† Bagihole cross (2002: 208). This suggests the men are not only oppressors of women but of other men. Men and female are different in respect to the gender roles in which they adopt. Naturally men are more strong, aggressive and emotionally detached compared to females who nurturing and caring. However, the family play’s is significant in terms of gender and the transition to adult. The family are the first interaction that the child will have and this is where the main socialisation occurs. They will learn the norms, values and morals form their family In the 1950’s and 1960’s the family role and adult responsibility were viewed as bring synonymous. Men were characterized by the capability to marry and support the family. Whereas, it was getting married and becoming a mother for women. By the age of twenty one woman was married and had a child by the age they was twenty three. This suggests that by the age twenty that men and women were recognised as adults. In the 20th century there was not much relevance’s of when adolescence was, but in their late teen ’s men worked and most of them had formed families. Transitions to adulthood were similar today and just before the industrialization because like then becoming and adult was a gradual and characterized by â€Å"semi-autonomy† with youths waiting until they were economically stable to set up a home. Eagly (1987) social role theory looks at two structural aspects of gender relations. These are the gendered divisions of labour and gendered based hierarchy. This theory demonstrates how these factors pin down the beliefs that society has about men and women. It shows hoe roles of individuals require particular traits and behaviour in order to be seen competent of their gender. Society for example has the idea that women have to be the child bearer and a process the child rearing traits. This is due to the biological reproduction that they have. The theory believes that due to the role segregation it encourages set beliefs and stereotype. This can be seen with the traits associated with each gender. Males are expected to be aggressive, brave, breadwinner and physical able. Whereas, in terms of female they are considered to be caring and nurturing due to their child rearing traits. The gendered stereotypes are reinforced by the status differences of men and women. There appears to be a link between divisions of labour and hierarchy. It is said that makes roles carry more importance and statuses compared to those of females. Home rearing is considered to be of low status compared to that of males who are of high statuses and bring money in. This suggests that stereotypes towards gender reflect upon the status of their traditional roles. It was Freud psychoanalytic theory that looks at the idea that biological factors and the social environment as defining influences of a child’s gender role development. Freud believed the gender role developed in the phallic stage, the child will experience a biological based attachment for the parent of the opposite gender. It was the belief of Freud that it was due the child’s identification with the same gender that resulted in gender role development. The theory helps to explain the reason why boys and girls act in certain ways. Freud stated† that boys are more motivated then girls acquire a more define gender role† Lowu (2007:291) there will is more define because of social pressures. According to money and ehrhardt (1972) biosocial theory there are specific events that determine a person gender role. Almost from the minute that the parent’s find out the sex of the child they will treat the child according to their gender. For example, if the sex of the child is a boy then the colour that the parent will dress them is typically blue and pink if it is a girl. The environment in which the child lives in is also determined by their gender. According to jones (2009:81) the colours that the parents pick shows masculinity or femininity. Therefore as there is this assumption then this affects the clothes, activities and toys they are encouraged to do, this would suggest that each gender are encourage to go down a particular path. The colours that the parents pick shows masculinity or femininity. Therefore as there is this assumption then this affects the clothes, activities and toys they are encouraged to do, this would suggest that each gender are encourage to go down a particular path This then in term may affect the way in which they portray themselves as young adolescents in school. Most girls fine this transition from youth to adolescence quiet difficult, most girls will portray themselves in a way to which they will achieve male approval, this is more easy for those of the popular group. This allows more opportunity for this type of grills to put them at rick and in dangerous situation as they are portraying an older sexuality. According to Woods (1994:32) state â€Å"that women are portrayed as women as sex objects who are usually young, thin beautiful, passive, dependent, and often incompetent and dumb. Female characters devote their primary energies to improving their appearances and taking care of homes and people†. If this is the image that is being injected in the youth minds then it is likely that this is how they will behaviour as they enter into a relationship. This can be seen as negative thing in the eyes of feminists as they beleive that women are oppressed by men. However, if they are raised the same way they have been parents were raised then this would be considered the norm. However, those who were not part of the in crowd reject the notion that there body was for the desire of men only. They opted for the comfy culture rather than the ‘tarty’ look. At this age there is a lot of images that young people will be surround by the media. As mentioned before there is the portrayal of ideal women all over the media, it this girl both in the popular crowds and none popular crowds can have an effect on the transition to adulthood. These images will allow the young girls to think that they have to look a certain way in order to be desire by males (Renold. E. (2005) This may resul t in it effecting there health as they may develop an eating disorder to get their desire look. This could be detrimental their ability to have a family in the future. This suggests that they will not meet one of the five core traditions. In comparison males transitions to adulthood by building on hierarchy among there group. A way that they do this is via showing there masculinity by taking up sports, this will be were all the hierarchy ranking will take place. If they have a problem they will generally solve their issue by fighting this results in them protecting their man hood. Whereas with girls if they have an issues with other then this will go on for a period of time ( Goodwin 2006) Another transition that men and women have is going to full time work. This can be a hard transition to adjust to as being a young adolescence most of the time does not mean having the responsibility of a full time job. Especially for women as they will also have to consider with the right time to have a family is. A problem with this is that they will have to a battle for equal pay. The equal pay act was not introduced till 1947 and was a direct change due to the changing roles of women in society. This means that men and women will receive the same amount of pay for the same job. As well as this, they can apply for the same position in a job regardless of where it is in the hierarchy. However, saying this and it being put into action is different. Still today there is a debate about men and women’s pay. If a man and women go for the same job it is more likely that the man will be given the job. A reason for this may be that if a women has ring her finger the employer will take into account that there is a high chance she will want a family. This mean that they would have to pay for maternity leave,whereas will a man this would not be the case. It is the believed that there is â€Å"An important part of this cultural change comes from providing better information to employees and to shareholders on a companys record on equal pay and employment, (www.guardian.co.uk) This may affect the way women transition into the workforce, this is because they may be put of the idea of career as they may feel what’s the point working at the same level as men only to receive less pay then them. To conclude it would suggest that gender does have a effect on the transition to adulthood. It is apparent that the way in which gender transitions in the past was based on the idea of the men being the bread winner and the female the child bearer. However this has seemed to change as time has moved on. The different theories look at the transition from different points of view but all suggest that gender does affect the transition. It will appear that girls more than more have a tougher time making the transition due to surrounding influences in society.

Todays Education System

Todays Education System An Essay on the Present Education System We live differently in the 21st century. This century is highly connected with technology advancement, high mobility, globalization, and generation Z. Generation Z or iGeneration is a name used for the cohort of people born from the early 2000s to the present day. This generation has some different characteristics with its preceding generation, allowing us to implement different approach in education. Our Education System: Today I will start with the problem of our current education system. The biggest problem is, it did not motivate kids. Millions of kids do not know any purposing of going to school, except obligation. When we went to school we were indoctrinated by scenario: work hard, rewarded did well, get a college, and finally you will have a job. But in the future, it is not guarantee anymore, not if the route to it marginalises what you think important about yourself. Moreover, facing the unpredictable economic circumstances. This current system was designed and conceived for a different age: Victorians, between 18th and 19th century. It was arranged in the intellectual culture of the enlightenment and in the economic circumstances of the industrial revolution. The intellectual model of the mind stated that the real intelligence consist of capacity of deductive reasoning and knowledge of the classics, what we come to think as academic ability. It divides people to academic and non academic, smart people and non-smart people. In consequences, many brilliant people think that they are not. In this system, these kids are medicated. They are forced to forget any distraction such as games, iphones, television, and focus to the boring stuff at school. Students start losing their interest, hardly thinking straight, and losing their attention completely. In class, they are given the theory and required to memorize it, without knowing the relevant of that context in real world. That is why students still disengaged. It becomes more severe with quantitative standardised testing. They only know they oblige to study and pass the standard. Education is modeled based on the interest of industrialization and in the image of it. Schools are organised on factory lines and students are its manufactured products. The Victorians produce education which remake us photocopy of each other. How do you be submissive, how do you sit patiently be disengaged for about two hours and take it. The arts are the victims of this mentality. The arts, especially address the idea of aesthetic experience, when senses are operating at their peak. When we arresting about the excitement of these things with our experiencing, when we are fully alive. While anaesthetic is experience which shut your senses off and deaden yourself to what is happening. We are getting our children educated by anaesthetising them. The implications are easy to be described. These kids only give answers based on what their teacher said. They are afraid to see things from different perspectives, lose their critical skill, and very bad predicting what will make them happy. The New Model of School Designing new model of education needs collaboration of students, teachers, schools, and government. Lets start with basic question, what kind of output that we really want from education system? I always imagine if schools can be place where students can come excitingly, full of self-directed knowledge, so much more passion and information about they want to do. It is the real learning process, they learn something when they have reason to learn it. First, we should waking them up to what is inside of themselves! If we are interested in the model of learning, we should not start from production line mentality. We have to change our direction from conformity-standardised testing and curriculum to divergent thinking. Divergent thinking is an essential capacity for creativity-the process of having original ideas that have value. It is ability to see lots of possible answers to a question, lots of ways to interpret a question, and to think laterally, not just in linear or convergent ways. We might not judge this subject is superior and this is not. We teach them how to believe their self interest, appreciate it, and facilitate that. It also crucial to change the culture of our institutions that treat academic students as the potentials product and non-academic students as the residuals. Second, we have to cut the disengaged chain between school and the reality. We must revised our goal: score oriented become exploration oriented. Students are not teached how to answer questions on the exam, but how one problem in the real word can be connected and answered by theory they learned in the class. They must not forced to forget their favourite games or television channels, but we lead combine them with education. The point is, we do not limit their imagination. They may come with unique questions or even unanswerable, but it is the way they can start thinking critically.Students will understand how their school linked to their life, and they used to see things from science perspective. Third, focusing on the reading comprehension and critical skill. Actually, it based on Indonesia condition. Trends in International Mathematics and Science (TIMSS) and Progress in International Reading Literacy Study (PIRLS) assessment revealed that the reading ability of Indonesian children is low. Whereas, reading ability is the fundamental of science learning. Why it can happen? One of the reason is, we do not have reading comprehension curriculum, we only have language curriculum. I also have just learned that reading to understanding is by making annotation beside the important paragraph and rewrite it on our own words through essay, not the multiple choice. The multiple choice-we used to use, is not stimulate students to love literacy and read, causing the open-minded is not formed. Finally, they do not know how to solve a problem-things they will face in reality. As I said before, this education reform also need teacher collaboration. We know, sometimes teacher treats their students as how they were treated by their teacher. It is totally different. Today generation is immune from such rigid school and strict rules are not effective anymore. Teachers have to know how to make them go to school voluntarily and fully motivated. The classroom has to be designed to provide enough space for improving students imagination and exploration. However, teachers are the executor of curriculum in the class. Go through country with the best education system, Finland, teachers there are well educated and trained. Better education system need better human resource to deliver it. Finally, what I hope to be in the new model of school and high school for 21st century are the students that full of learning enthusiasm and the teachers that focuses on exploration rather than how to prepare students passing the exam. I want reading-writing culture and curiosity colored the school. I do not want modern institution dumped critical thinking just because there is not any argument facilitator. Education is not knowledge transfer that remake students as a blueprint of their teacher. Students must have ability to transform the knowledge, so the final goal of education to put out generations who can answer the era threat can be achieved. As the Malcolm Forbes quotes Educations purpose to replace an empty mind with an open one

Black Women clubs of denver Essay -- essays research papers

In this study you asked us to look more closely at the plight of African American women of the west and their impact on the community in which they lived. I found that most of the articles assigned were of little help in achieving this objective, in that a large amount of the articles did not give much mention of the effects of these women on their communities. However, I was able to find little bits of helpful information in each article and with the help of the article â€Å"Lifting as We Climb† (which held the most valuable information), I was able to formulate the following analyze.   Ã‚  Ã‚  Ã‚  Ã‚  African American women that are focused on in the article â€Å"Lifting as We Climb†, I believe, give a fairly accurate overview of the over all impact and ideal system that many blacks in the community held. Therefore, to understand African American women’s ideal, which invariably is a reflection of the overall black ideal system, we must first evaluate the overall stance of blacks across the nation. The increasingly large amount of racism that was being experienced by blacks across the country during the reconstruction era and later, forced the African American’s of this nation to unite under one common belief. Originally the belief was that, with the 13th and 14th amendments, blacks would soon be experience full participation in the main stream culture of white Americans. This, they would soon realize, would not be the case and so a new approach must be taken. African A...